Laser Crystal - An Overview
Laser Crystal - An Overview
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Laser modeling and simulation may be used to reliably ascertain the optimum crystal dimensions, doping density And maybe values of more parameters.
人造红宝石激光晶体是首次实现激光输出的材料。可用焰熔法、提拉法或助熔剂法生产单晶。用提拉法容易获得大尺寸优质晶体。
The host medium influences strongly the wavelength, bandwidth and changeover cross-sections of pump and laser transitions and in addition the upper-point out life span.
激光晶体由发光中心和基质晶体两部分组成。大部分激光晶体的发光中心由激活离子构成，激活离子部分取代基质晶体中的阳离子形成掺杂型激光晶体。激活离子成为基质晶体组分的一部分时，则构成自激活激光晶体。
For quasi-a few-degree laser gain media or simply 3-degree gain media, a person generally should limit the duration to a price that is too small for productive pump absorption, as reabsorption effects would usually spoil the functionality. For side pumping, more factors come into Engage in; In addition to economical pump absorption, it is necessary to obtain an appropriate spatial condition in the gain profile.
g. a skinny disk. As another illustration, Q-switched lasers attain an increased population density inside the higher laser level and therefore are hence much more sensitive to quenching consequences and energy transfer processes; thus, a lower doping density is usually appropriate for these products. For top-energy lasers, reduced doping densities in many cases are utilized to limit the density of heat generation, Though slim-disk lasers get the job done best with highly doped crystals. Numerous laser items will not get to the whole general performance potential simply because this sort of specifics have not been correctly worked out.
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On top of that, some overall flexibility is lost in experiments if a person are not able to try out absorbers with unique thickness or doping concentration, such as, with no exchanging the laser crystal itself.
作为工业上使用较多的都是高掺钇铝石榴石，也就是说掺入不同的元素来达到不同的效果；作为工业激光，关注以下性能：
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It may be oriented for close to perpendicular incidence in the laser beam, or at Brewster's angle. It may be mounted in a few reliable mount which also acts being a heat sink. More substantial crystals usually are employed for aspect pumping e.g. with substantial-electric power diode bars.
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All those surfaces which can be handed from the laser beam are Ordinarily either oriented at Brewster's angle or have an anti-reflection coating.
Certainly, it is very appealing that a supplied crystal quality is made continually, although various laser types may have another sensitivity to product parameters.
There's an array of crystalline media, which may be grouped according to special atomic constituents and crystalline constructions. Some critical teams of crystals are:
With That idea, one doesn't require an extra saturable absorber crystal, in order that a single could make far more compact Q-switched laser setups with decrease inner parasitic losses. On the other hand, unwanted Unwanted side effects might also happen, such as getting undesired valence states on the concerned ions or Power transfers.
GWU delivers all frequent laser crystals (Nd:YVO4, Nd:YAG, Yb:YAG etc.) which has a wide selection of specifications. Other than the properly-set up materials, ground breaking crystals with fantastic Qualities like Yb:CALGO can open up new horizons for demanding laser programs. No matter irrespective of whether specific parts for R & D needs are needed or get more info Charge-effective quantities in little, medium or substantial batches with in-time delivery for that production line are wanted: GWU’s dedicated provider really helps to find the finest core elements for your personal application.
It is clear that various apps result in quite various prerequisites on laser acquire media. For this reason, a wide assortment of various crystals are utilized, and earning the best choice is important for developing lasers with the best possible functionality.
激光晶体（laser crystal），可将外界提供的能量通过光学谐振腔转化为在空间和时间上相干的具有高度平行性和单色性激光的晶体材料。是晶体激光器的工作物质。